What this means is that Alfresco WCM tries to stay out of the way in the delivery tier - things like the technology platform used in the delivery tier, the URL format, MVC model used (or not), caching strategies etc. are not dictated or limited in any way by Alfresco. We simply deploy approved content out to your delivery tier (whatever it is) and let you choose the best way to deliver that content to your audience.

We are now looking for good CMS to build corporate web site with. Informational pages, news and so on. It should adequate requirements I mentioned in first post, because we have separate team of HTML coders and SEO guys and that is their requests.

We have developers and we can spend some time (about week or two) creating modules, and I am trying to understand: is Alfresco a tool , we've looked for?:)

Once, the content is baked and ready to be published it is up to you on how to deliver it. There are lot of variety of web frameworks out there that you can use. It can be something as simple as JSPs pages to using Drupal or even Sharepoint. The choice is entirely yours. With our Clients we done couple of different implementations and have prototyped a lot more. Some of the ones we've come across;